services:
  api1:
    image: payment2:latest
    restart: always
    networks:
      - backend
      - payment-processor
    depends_on:
      - redis
      - database
    deploy:
      resources:
        limits:
          cpus: '0.3'
          memory: '64MB'

  api2:
    image: payment2:latest
    restart: always
    depends_on:
      - redis
      - database
    networks:
      - backend
      - payment-processor
    deploy:
      resources:
        limits:
          cpus: '0.3'
          memory: '64MB'

  api3:
    image: payment2:latest
    restart: always
    depends_on:
      - redis
      - database
    networks:
      - backend
      - payment-processor
    deploy:
      resources:
        limits:
          cpus: '0.3'
          memory: '64MB'

  nginx:
    image: nginx:latest
    restart: always
    ports:
      - '9999:9999'
    volumes:
      - ./nginx.conf:/etc/nginx/nginx.conf
    networks:
      - backend
    depends_on:
      - api1
      - api2
      - api3
    deploy:
      resources:
        limits:
          cpus: '0.15'
          memory: '9MB'

  redis:
    image: redis:7.2-alpine
    restart: always
    platform: linux/amd64
    ports:
      - '6379:6379'
    networks:
      - backend
    deploy:
      resources:
        limits:
          cpus: '0.40'
          memory: '25MB'

  database:
    image: postgres:17-alpine
    restart: always
    command: postgres -c checkpoint_timeout=600 -c max_wal_size=4096 -c synchronous_commit=0 -c fsync=0 -c full_page_writes=0
    platform: linux/amd64
    ports:
      - '5432:5432'
    environment:
      - POSTGRES_DB=payment
      - POSTGRES_USER=postgres
      - POSTGRES_PASSWORD=postgres_pwd
    volumes:
      - ./init.sql:/docker-entrypoint-initdb.d/init.sql
    healthcheck:
      test: ['CMD-SHELL', 'pg_isready -U postgres']
      interval: 3s
      timeout: 3s
      retries: 5
    networks:
      - backend
    deploy:
      resources:
        limits:
          cpus: '0.25'
          memory: '124MB'

networks:
  backend:
    driver: bridge
  payment-processor:
    external: true

volumes:
  db_volume:
  redis_data: